I don't like black wheels on just about any car, unless they are very clean they just dull it all down.
I am a silver wheeler at heart, and indeed Lisa's mirror finish BBS rims on her black GTi Anniversary are probably the best looking wheels I have ever had the pleasure to clean
As for options, an anthracite or gun metal finish could be a nice compromise...when clean they will sparkle in the sun but when dulled, won't be quite as tacky as black (which I always think look like they have lost their wheeltrims!!!)
As for the question about matching finishes, JP Coatech from Carnoustie did a fine job on my summer rims, in a finish called "Bright Sparkle" or maybe it was "Shimmer"...can't recall now...but they are quite "shimmery" when clean. The silver is a shade darker than original, so the "Sparkle" version might hit the spot for you. They have a wide range, phone up and ask to talk to Ewan. Oh and they were in the £40 per rim ALL IN ballpark.
Campbell